Why do some rolling mills use sealed spherical roller bearings?

Mar 05, 2024

The rolling mill is an indispensable key equipment in the metal rolling process and is widely used in production lines in steel, non-ferrous metals, and other industries. During the rolling process, the mill must withstand huge pressure and friction, so the requirements for the bearings are extremely high. Sealed spherical roller bearings, as a special bearing type, are widely used in some rolling mills because of their unique performance and advantages. This article will explain why some rolling mills choose sealed spherical roller bearings.

1. Basic structure and characteristics of sealed spherical roller bearings

The sealed spherical roller bearing is a roller bearing with a self-aligning function. Its structural features include:

• The outer ring has double ribs.

• The inner ring has a single rib.

• The rollers are symmetrical spherical rollers.

• The cage Adopts a window or solid structure.

This bearing has good aligning performance, strong load-bearing capacity, high limit speed, smooth operation, and low noise. In addition, sealed spherical roller bearings also have good sealing performance, effectively preventing contaminants such as dust, water, and moisture from entering the inside of the bearing, thereby extending its service life.

2. Performance requirements of rolling mill bearings

The bearings' performance requirements are extremely strict during the rolling mill's working process:

1. Bearings must withstand huge radial and axial, impact, and vibration loads.

2. The working environment of rolling mills is harsh, often accompanied by unfavorable factors such as high temperature, high humidity, dust, etc. Therefore, bearings are required to have good high-temperature resistance, wear resistance, corrosion resistance, and other performance.

3. The rolling mill needs to maintain continuous operation for a long time, so the reliability and stability of the bearings are extremely high.

3. Application advantages of sealed spherical roller bearings in rolling mills

Strong adaptability: Sealed spherical roller bearings have a self-aligning function that can adapt to installation errors, shaft deformation, and inclination of the bearing seat hole, ensuring the bearing's normal operation. This feature allows the bearings to better withstand radial and axial loads and shock and vibration loads in rolling mills.

Strong load-bearing capacity: Sealed spherical roller bearings use high-strength materials and advanced design and manufacturing processes and have high load-bearing capacity. In the rolling mill, this kind of bearing can withstand huge pressure and friction and ensure the stable operation of the rolling mill.

Smooth operation and low noise: Sealed spherical roller bearings adopt an optimized roller design and cage structure, making the bearings more stable and quieter during operation. It helps improve the rolling mill's working environment and reduce operator fatigue.

Good sealing performance: Sealed spherical roller bearings adopt a special sealing structure design that effectively prevents contaminants such as dust and moisture from entering the inside of the bearing. It helps extend bearing life and reduce maintenance costs.

High-temperature adaptability: Sealed spherical roller bearings are made of high-temperature-resistant materials and can work normally in high-temperature environments. It enables the bearings to adapt to the high-temperature working environment in the rolling mill and ensure its continuous operation.

Easy maintenance: The sealing performance of sealed spherical roller bearings effectively prevents contaminants from entering the inside of the bearing, thereby reducing bearing wear and failure. It reduces the rolling mill's maintenance frequency and cost and improves production efficiency.

It is a sealed spherical roller bearing designed and manufactured by FV.

4. Conclusion

Sealed structure spherical roller bearings are widely used in some rolling mills because of their unique properties and advantages. This kind of bearing has the characteristics of strong adaptability, strong load-bearing capacity, smooth operation, low noise, good sealing performance, and high-temperature adaptability, and it can meet the strict requirements of rolling mills for bearings. Therefore, sealed spherical roller bearings are ideal for rolling mill bearings.

However, it should be noted that different types of rolling mills and different working environments may have different bearing requirements. When selecting bearings, it is necessary to comprehensively consider factors such as the actual needs of the rolling mill and the working environment to select the most suitable bearing type. At the same time, you also need to pay attention to the installation, debugging and maintenance of bearings to ensure the normal operation of the bearings and extend their service life.

In short, sealed spherical roller bearings are an excellent bearing type with broad prospects for application in rolling mills. Sealed spherical roller bearings will be more widely used and promoted with the continuous development and advancement of rolling mill technology.